Hot Tub Myths Debunked: Separating Fact from Fiction
Max PiggottHot tubs have been around for decades, but plenty of myths still get repeated. Whether you are buying your first or have owned one for years, here are the most common misconceptions and the facts behind them.
Myth 1: hot tubs are expensive to run
The facts: older models could be inefficient, but modern hot tubs are designed with energy efficiency in mind. Good insulation, heat pumps and smart controls help keep running costs down. The biggest factors are the quality of the insulation, the cover and how often you use the spa.
Tip: A good insulated cover and a steady temperature setting make a real difference to running costs.
Myth 2: you need to change the water constantly
The facts: you don't need to drain and refill every week. With proper water care and filtration, most owners only change the water every 3–4 months. Regular testing, balancing and filter cleaning keep the water fresh and safe. Read our post about the Water Test App for help keeping the water balanced.
Tip: Good water care products and an ozone or UV sanitation system can extend the time between water changes.
Myth 3: hot tubs are high maintenance
The facts: a well-kept hot tub doesn't need constant attention. Checking the water, cleaning the filters and wiping down surfaces takes just a few minutes a week. Many modern hot tubs also have automated systems that help with water treatment.
Tip: A simple weekly routine keeps your hot tub in good shape with very little effort.
Myth 4: hot tubs are full of bacteria
The facts: a properly maintained hot tub is safe. Bacteria thrive in untreated or neglected water, but with the right routine, including a sanitiser such as chlorine or bromine, the water stays clean and hygienic.
Tip: Shower before getting in to reduce contaminants, and keep up with regular testing. Our Water Test App can help.
Myth 5: hot tubs are only for warm weather
The facts: hot tubs are for all year. Many people enjoy them even more in the colder months, as warm water on a cold evening is hard to beat. Well-insulated hot tubs with heat pumps or efficient heaters are designed to work in every season.
Tip: In winter, keep the cover on when the spa is not in use and keep the temperature steady to avoid wasting energy.
Myth 6: you can't use a hot tub if you have sensitive skin
The facts: many people with sensitive skin enjoy hot tubs, as long as the water is well balanced. Imbalanced water or too much chlorine can cause irritation, so test regularly. The Canadian Spa Company Water Test App can help with this.
Tip: Rinse off after soaking and use a moisturiser to stop your skin drying out.
Myth 7: more jets mean a better hot tub
The facts: jets matter, but quality, placement and power matter more than the number. A well-designed hot tub with fewer jets can give a much better massage than one with lots of weak jets.
Tip: When shopping, look at how the jets are positioned and whether you can adjust them, rather than just counting them.
Myth 8: hot tubs aren't worth the money
The facts: for many families a hot tub is money well spent on relaxation and time together. A regular soak helps you unwind, eases tired muscles and can help you sleep better. A well-maintained hot tub can also make your home more appealing. Read our post Holiday or Hot Tub?
Tip: Choose a well-insulated hot tub from an established manufacturer such as Canadian Spa Company for long-term value.
Final thoughts
Hot tubs are often misunderstood. In reality, modern spas are efficient, easy to look after and a great way to relax. With the right care, a hot tub gives years of enjoyment.
More myths, and the facts
Myth 9: hotter water is better
The facts: the guidance usually given is a maximum of 40°C for adults. Most people are comfortable at 37 to 38°C, and BISHTA advises 36°C as the maximum for children under 12. Higher temperatures can leave you light-headed. The NHS explains the signs of heat exhaustion.
Myth 10: plug and play hot tubs can't cope with winter
The facts: a 13 amp spa heats more slowly than a 32 amp spa, but with a good cover and a steady temperature it works all year. Our guide to using a 13 amp spa in winter explains how.
Myth 11: you should turn the hot tub off when you're not using it
The facts: reheating a full spa from cold uses a lot of energy and takes many hours. Water heats at around 1 to 2°C an hour with the cover on, so keeping a steady temperature, or dropping it a few degrees, usually makes more sense. Turning it off in winter also risks frost damage.
Myth 12: you can swim in any hot tub
The facts: hot tubs are made for sitting and gentle exercise. To swim against a current you need a swim spa.
Myth 13: clear water is clean water
The facts: water can look clear while sanitiser is low or pH is off. Only testing tells you. Aim for free chlorine of 1.0 to 1.5 ppm, pH of 7.2 to 7.6 and total alkalinity of 80 to 120 ppm.
Myth 14: filters last for years
The facts: filters wear out. Replace hard-shell spa filters every 6 to 12 months, and Glacier filters every 6 months for best performance or up to 12 months for economy, sooner with heavy use.
Myth 15: you need planning permission for a hot tub
The facts: a hot tub on its own usually doesn't. A gazebo or building around it may, depending on its size and position. See the Planning Portal guidance on outbuildings.
Myth 16: hot tubs are safe for everyone
The facts: most people can use one safely, but not everyone. You shouldn't use a hot tub while pregnant. If you have a heart condition, high or low blood pressure or another medical condition, check with your GP first, and avoid alcohol before soaking.
Frequently asked questions
How long should a soak last?
About 15 to 20 minutes at 37 to 38°C suits most adults. Get out sooner if you feel too hot.
Do I need a special electricity supply?
Plug and play spas use a 13 amp socket. Larger spas need a dedicated supply installed by a qualified electrician.
How often should the water be changed?
Every 3 to 4 months for most owners, or sooner with heavy use.
Choosing a hot tub?
Compare our hot tubs and swim spas, or visit our showroom near Gatwick.